You see the slight curve to the left rising up after the flatter portion that is about mid-pic?
If it's taken on the GW where I think it was, one's butt almost bumps the floor on the decent from the top at that place. My youngest daughter and I climbed to that lookout summit at the exact place.
The Chinese mounted a handrail on the parapet to help climbers. Trouble is - they are about mid-shin high and work well only if you drag yourself up.
Your lucky to have found any wall at all to walk on. I have friends that visit in China and the wall stones are stolen by the hour for their local homes still because communism is THAT popular.